Unreal Engine Issues
Unreal Engine Issues
The Find Node Can Crash on Compile After a Blueprint Compile Error
UE - Gameplay - Nov 21, 2019The "Find" node can cause a crash if the a map with a struct value changes type while connected, is disconnected and reconnected. Compilation fails and crashes the engine. Found in 4.23.1 CL#963142 ...
NavLinkProxy potentially causing extra Character Movement
UE - AI - Feb 12, 2020The user is using a Nav Mesh Bounds Volume and a Nav Link Proxy. They are calling AI Move To to navigate to the point, but the Character reproduces extra movement and goes a bit past it. For debuggi ...
Generation of sub-level LOD doesn't work when forward rendering is used
UE - World Creation - Worldbuilding Tools - World Composition - Mar 9, 2020When using WorldComposition and building LOD for a sublevel, textures of generated Landscape LOD are not correct when the project has forward rendering enabled. The issue is that the material gener ...
Hot Reload Temporary dlls and pdbs Aren't Getting Cleaned Up Between Runs
UE - Foundation - Cpp Tools - Hot Reload - Dec 14, 2020I'm seeing it as an issue in at least 4.25.4, maybe prior. I'll update after checking 4.24. From the tests at my desk I could see that the HotReload.State file that DeleteTemporaryFiles (HotReloa ...
Crash when setting Retainerbox scale is set to 0 at runtime
UE - Editor - UI Systems - Jan 22, 2021Crash at runtime when Retainerbox scale is set to 0. The call stack indicates that the size of RenderTarget2D is set to 0. Attached repro project sets the scale of the RetainerBox that wraps the Im ...
FixupRedirector issues with packages containing multiple public assets (commandlet and FAssetFixUpRedirectors)
UE - Anim - Sequencer - Jan 19, 2024A customer is reporting that a renamed LevelSequence will continuously be resaved when Fixing the Redirectors from the Content Browser. The problem would be the incorrect redirector for the Blueprin ...
Typo in NaniteRasterizer.usf preventing low tessellation mode at distance
UE - Graphics Features - Nanite - Nov 12, 2025A typo in a conditional compilation macro in NaniteRasterizer.usf causes code controlling distant tessellation reduction to never be included in final shader code. This means that the low tessellati ...
Having a [ or ] in a folder name will cause that filepath to be invalid for anything related to an .ini file
Tools - Feb 16, 2017If a [ or ], which are used for syntax in .ini files, are included in a folder name, problems occur when that filepath is used for anything that is recorded in .ini files. The example given in the r ...
Enabling Preview Rendering Level Mobile GLES3.1 on Map With Vector Fields Results in Editor Crash
UE - Platform - Mobile - May 21, 2018Reproduced Crash on 4.18.3, 4.19.2, and Main CL 4081612. Licensee states: Based on a quick inspection of the code, it seems FVectorFieldVisualizationVertexFactory::ShouldCache() returns false (req ...
Ensure triggers when undoing change to newly created variable
UE - Gameplay - Blueprint - Sep 28, 2018Ensure will trigger when undo reverts text to default value. "This triggers an ensure because the undo ends up calling SKismetInspector::ShowDetailsForObjects(), which forces the keyboard focus to ...